✭✭✭✭✭ = I LOVED this book; it is a truly amazing work, one of my favorites, and I would highly recommend it!
✭✭✭✭✩ = I really liked this book, it was a fun read; it wasn't amazing-amazing quality but it was still awesome.
✭✭✭✩✩ = I didn't dislike this book, but I didn't love it either. There was nothing directly wrong, but nothing directly amazing.
✭✭✩✩✩ = Overall I did not like this book; but there may have been one or two elements I liked, but still not good enough for me to really like it.
✭✩✩✩✩ = There was absolutely nothing I liked about this book.